JPH09151030A - Delivery control method for conductor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent straying and disconnection of a conductor even if line speed of a covered conductor by a receiving machine suddenly increases or reduces or even if a drum residual quantity of the conductor wound round a stationary drum reduces. SOLUTION: An initial drum winding quantity D is inputted in ST. 52, and when a receiving quantity E of a conductor delivered from a stationary drum is inputted in ST. 52, a drum residual quantity B (=D-E) is calculated in ST. 53. Next, a measured value of receiving speed A of a receiving machine or a command value is inputted in ST. 54, and when standard receiving speed, for example, flyer rotating speed every minute 700 (m/min) is inputted in ST. 55, operation is performed in ST. 56 on optimal flyer rotating speed C corresponding to a change in an environmental condition. The optimal flyer rotating speed C on which operation is performed in ST. 57 is commanded to a servomotor for a flyer, and since the servomotor rotates the flyer at optimal rotating speed corresponding to a change in the environmental condition in ST. 58, a conductor wound round the stationary drum is delivered at proper delivering speed without causing looseness and disconnection.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conductor feeding control method capable of feeding a conductor for a covered electric wire, which is a linear body wound around a stationary drum, at an optimum speed.

[0002]

2. Description of the Related Art Conventionally, various methods have been known for feeding a conductor for a covered electric wire which is a linear body wound around a drum. As a conventional example, JP-A-59-143
The conductor feeding device disclosed in Japanese Patent No. 866 will be described with reference to FIGS. 3 to 8. 3 to 5 are block surfaces showing an example of a conductor feeding device and related steps, FIG. 6 is a perspective view showing an example of a fryer, and FIG. 7 is an explanatory view showing a contact angle between a guide part of the fryer and a feeding conductor. 8 is a diagram showing the relationship between the remaining amount of the drum and the conductor feeding force.

As an example of the manufacturing process for manufacturing the covered electric wire 4 from the linear conductor 2, the unannealed conductor 2 which is not annealed as shown in FIG.
Has been wound around. Further, a flyer 7 concentric with the stationary drum 3 is provided so as to rotate at a constant speed by a motor, and the flyer 7 and the stationary drum 3 constitute a conductor feeding device 20. Then, the conductor 2 in the non-annealed state is taken out by the first take-up machine 21 integrated with the annealing machine 22 that performs the annealing treatment. At this time, the bundle-shaped conductor 2 wound around the stationary drum 3 can be easily delivered by rotating the fryer 7 at a constant speed.

Next, the conductor 2 a in the annealed state annealed by the annealing machine 22 is taken out by the second take-up machine 24 via the extruder 23. The extruder 2 coats the outer periphery of the conductor 2a with a synthetic resin such as polyvinyl chloride (PVC) to form the covered electric wire 4. Then, the covered electric wire 4 is cooled by the next cooler 25,
The curing of the coated part is accelerated. The cooler 25 is a gutter-shaped water tank in which cooling water is forcedly circulated. Then, the cooled coated electric wire 4a is taken up by the third take-up machine 26 which is integrated with the electric wire take-up machine 27, and is wound around the electric wire drum into a bundle of a predetermined length. The first take-up machine 21, the second take-up machine 24, and the third take-up machine 26 are synchronized with each other so that the conductor 2a and the covered electric wire 4 are not loosened before and after the extruder 23 and the cooler 25. Has been done.

In the case of FIG. 4, the manufacturing process is similar to that shown in FIG. 3, but the first take-up machine 21 is a separate example from the annealing machine 22 that performs the annealing treatment. is there. Also,
In the case of FIG. 5, unlike FIGS. 3 and 4, the conductor 2a in the annealed state that has already been annealed is the stationary drum 3
This is another example in which the conductor 2a is wound around the first take-up machine 21, and the step of covering the conductor 2a with the extruder 23 is performed next to the first take-up machine 21. 4 and 5, the first take-up machine 21, the second take-up machine 24, and the third take-up machine 26 are the same as in FIG.
Are in tune.

The conductor feeding device 20 will be described in more detail. As shown in FIG. 2, the stationary drum 3 is fixed on a pedestal, and as shown in FIG. 6, the fryer 7 is larger than the boss portion 34. A support wheel 35 having a diameter is provided via a plurality of spokes 36, and a guide portion 32 for feeding out a small diameter is provided to the support wheel 35 via a plurality of support rods 37. Further, a drive motor 10 for rotating the fryer 7 is fixed on another mount, and the motor 10
The motor shaft 9 passes through the shaft core of the stationary drum 3 via a bearing and is connected to the boss portion 34 of the fryer 7. With this structure, the linear conductor 2 wound around the stationary drum 3 rotates at a constant speed at a predetermined speed.
It is taken up by the take-up machine 21 via.

The conductor feeding device 20 having the above structure is shown in FIG.
When an ON signal is applied to the take-up machines 21, 24 and 26 as shown in FIG. 5, the conductors 2 and 2a and the coated electric wires 4 and 4a start taking-up at a standard speed, for example, 700 (m / min). Then, the drive signal for rotating the fryer is activated by the switch signal of the take-off machine 21, and 900 (rpm) so that the fryer 7 gradually adjusts to the take-up speed of the take-up machine 21.
Independently rotated at a constant speed. At this time, in the conductor feeding device 20, since the conductor 2 is pulled, a frictional force that presses the guide portion 32 of the fryer 7 is generated. However, since the flyer 7 is rotating at a constant speed, it assists the conductor 2 to be paid out from the stationary drum 3, and abrupt tensile resistance when the conductor is paid out from the stationary drum 3 and frictional resistance with the flange of the stationary drum 3. Prevents the conductor from breaking.

[0008]

However, in the above-mentioned conventional conductor feeding method, as shown in FIGS. 3 to 5, the lines of the conductors 2 and 2a and the covered electric wires 4 and 4a always run at the standard speed. Not the extruder 23
The take-up machines 21, 24, 26 may decelerate / accelerate or stop when the color of the covering color is changed, and when stopped, rotation of the fryer 7 is also stopped. Therefore, when decelerating the line or when shifting from the stop state to the acceleration state, the rotation of the fryer 7 becomes too fast, and the conductor 2 is unwound too much,
There is a problem of fraying and twisting. Also, when restarting, the unwound conductor, so-called,
There is also the possibility of disconnection due to tension (overload) that occurs when the "slack conductor" is entangled with something.

Further, the feeding speed of the conductor 2 is related to the frictional force with the guide portion 32 as described above, but this frictional force is also influenced by the remaining amount of the conductor 2 wound around the stationary drum 3. . That is, as shown in FIG. 7, in the case of the remaining amount L1 with a large amount of remaining drum, the contact angle W1 of the fryer 7 with the guide portion 32 is large, so that the component force in the center direction of the fryer 7 is small and the tension is relatively small. Complete. However, when the remaining amount L2 of the drum is small, the contact angle W2 is small, so that the component force in the center direction of the fryer 7 is large and the frictional force with the guide portion 32 is increased for the same tension. Therefore, in the case of the increase of the feeding force and the remaining amount L2 where the feeding speed becomes faster, it becomes a factor that promotes the increase of the tension. The rotation speed 900 (rpm) of the fryer is set to the drum remaining amount L2 at which the feeding speed of the conductor 2 wound around the stationary drum 3 becomes the highest.

FIG. 8 is a diagram in which the change in the feeding force of the conductor 2 with respect to the remaining amount of the drum is experimentally obtained. Specifically, the rotation speed of the fryer 7 is 900 (rpm)
And the remaining amount of the conductor 2 with a total length of 60,000 meters wound around the stationary drum 3 is about half of the total length and half of the total length,
It shows the change of the feeding force at 1/4, 1/12 and when the remaining amount is substantially zero. As is clear from the figure, the change in the payout force is gentle up to about ½ of the total length, but it can be seen that the payout force sharply increases especially after ¼ of the full length.

The object of the present invention was made in view of the above problems, and the line speed of a coated electric wire by a take-up machine suddenly increases or decreases, or the remaining amount of a conductor wound around a stationary drum decreases. Even so, it is still another object of the present invention to provide a method for controlling the pay-out of the conductor, in which the conductor does not fray or break.

[0012]

SUMMARY OF THE INVENTION The above object of the present invention is to provide a conductor which is drawn out by the rotation of a fryer concentric with the stationary drum when the conductor is taken out from a stationary drum around which the conductor is wound. In the feeding control method, the number of drums of the conductor in the stationary drum, the take-up speed of the take-off machine, and the flyer rotation speed at the standard take-up speed are calculated based on the flyer rotation speed to control the flyer rotation speed. This can be achieved by a conductor feeding control method characterized by the above.

Further, it is achieved by controlling the rotational speed of the fryer by a speed command to the servo motor. Further, the rotation speed of the fryer is determined by multiplying the ratio of the take-up speed and the remaining amount of the drum by the ratio of the fryer rotation speed at the standard take-up speed and the standard take-up speed. Is achieved in.

According to the conductor feeding control method described above, the rotational speed of the fryer is calculated by calculating the remaining amount of the conductor in the stationary drum, the take-up speed of the take-up machine, and the flyer rotational speed at the standard take-off speed. To control. Therefore, even if the line speed of the conductor by the pulling machine suddenly increases or decreases, or the remaining amount of the conductor wound on the stationary drum decreases and the frictional force between the conductor and the guide portion of the fryer changes, Since the rotational speed of the fryer is controlled by the speed command to the servo motor so as to keep the tension of the conductor fed from the stationary drum constant, or in synchronization with the feeding speed of the conductor, the fray of the conductor is frayed. It is possible to prevent the wire breakage.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a conductor feeding control method of the present invention will be described in detail below with reference to FIGS. 1 and 2. FIG. 1 is a block diagram showing a conductor feeding method of the present invention, and FIG. 2 is a schematic view showing an example of a conductor feeding apparatus corresponding to the conductor feeding method. First, the configuration of the conductor feeding device will be briefly described. As shown in FIG. 2, the conductor feeding device 1 is a stranded wire that constitutes a core wire of a coated electric wire, and includes a stationary drum 3 around which a conductor 2 in an unannealed state that has not been annealed is wound, Stationary drum 3
And a flyer 7 that has a concentric guide portion 32 and is independently rotatable by being connected to a servo motor 10 that is a drive motor. When the conductor 2 is pulled from the stationary drum 3 by the take-up machine 21, the fryer 7 feeds the conductor 2 at an optimum number of revolutions according to the remaining amount of the conductor 2 on the stationary drum 3 which changes from moment to moment. .

More specifically, the stationary drum 3 is fixed to a frame 8, and the fryer 7 is provided with a guide portion 32 concentric with the stationary drum 3. Further, behind the stationary drum 3, a servo motor 1 having a motor shaft 9 protruding forward is provided.
0 is fixedly provided on another mount. The motor shaft 9 penetrates the shaft core of the stationary drum 3 and is rotatably supported via a bearing 11. Further, the fryer 7 has a nut 12 at the front end of the motor shaft 9.
And the inner end of the guide portion 32 is provided at such a position as to hold the front flange of the stationary drum 3. The stationary drum 3 fixed to the pedestal 8 is covered with a cover 14 having a conductor take-out hole 13 at its front end.

The take-up machine 21 takes in the non-annealed (or annealed) conductor 2 (or 2a) from the rear side and sends it to the front un-annealed machine 22 (see FIGS. 3 to 5). is there. That is, the conductor 2 is wound around the upper fixed wheel 17 and the lower fixed wheel 18, and then the annealing machine 22
Sent to It should be noted that the power for take-up is provided on the upper fixed wheel 17.

In this embodiment having the above-mentioned structure, the servomotor 10 controls the rotational speed of the fryer 7 to more reliably prevent the conductor 2 from being frayed or broken. As shown in FIG. 1, first, in step ST.51, an initial drum winding amount D (m) is input to a CPU (not shown). Next, in ST. 52, the take-up amount E (m) of the conductor 2 fed from the stationary drum 3 is measured by a sensor (not shown) and input to the CPU, and in ST. 53, the remaining amount of drum B (=
D-E) (m) is calculated.

Next, in ST. 54, the measured value or command value of the take-up speed A (m / min) of the take-up machine 21 is input to the CPU, and in ST. 55, the standard take-up speed, eg 700 ( m / m
When the fryer rotation speed R (rpm) in (in) is experimentally obtained and input, the CPU calculates the optimum fryer speed C (rpm) corresponding to the change in environmental conditions in ST.

That is, the formula for calculating the fryer speed C is C =
R / 700 · A / B · k (where k is a coefficient). In this formula, for RA / 700, the fryer rotational speed R (rpm) at the standard take-up speed of 700 (m / min) is determined and the ratio A / 700 with the current take-up speed is set. By calculating, the rotation speed command (rpm) is converted into a voltage change and given to the servo motor. Basically, this speed control prevents so-called "unwinding" of the conductor. Also,
At 1 / B · k, when the remaining amount of the conductor drum decreases, the number of rotations of the operation of unwinding from the stationary drum, that is, the so-called “hook-and-loop motion” becomes faster. Therefore, the coefficient k
Is a coefficient for making a calculation adjustment in order to obtain the rotational speed of the rope jump motion from the measured value.

In the control of the present embodiment described above, since the flyer rotation is controlled in accordance with the hobbiting motion of the stationary drum, it is possible to suppress the unwinding and the tension increase of the conductor at the time of feeding. Here, when R · k / 700 = K (coefficient), the optimum flyer speed C can be calculated by the calculation formula C = K · A / B. Then, the optimum flyer speed C calculated in ST. 57 is commanded to the fryer servo motor 10. Finally, S
At T. 58, the servo motor 10 rotates the flyer 7 at an optimum rotation speed corresponding to changes in environmental conditions, so the conductor 2 wound around the stationary drum 3 is delivered at an appropriate delivery speed without causing fraying or disconnection. Be done.

According to the conductor feeding method of the present embodiment described above, the drum remaining amount B of the conductor 2 in the stationary drum 3, the take-up speed A of the take-up machine 21, and the fryer rotational speed R at the standard take-up speed are also obtained. Is calculated to control the rotational speed C of the fryer 7. In the feeding control method, the rotational speed C of the fryer 7 is controlled by a speed command to the servo motor 10 so that the tension of the conductor 2 fed from the stationary drum 3 is constant regardless of the remaining amount of the drum. Or is controlled so as to be synchronized with the feeding speed of the conductor 2.

Therefore, the line speed of the conductor 2 by the take-up machine 21 suddenly increases or decreases, and the drum remaining amount B of the conductor 2 wound around the stationary drum 3 decreases, so that the conductor 2 and the guide portion 32 of the fryer 7 are separated from each other. Even if the frictional force between the conductors changes, the conductor 2 can be reliably prevented from being frayed or broken, and the reliability of the conductor feeding device 1 can be improved.

The present invention is not limited to the above-described embodiments, but can be implemented in other modes by making appropriate changes. For example, although the fryer 7 having the guide portion 32 is used in the present embodiment, a wheel-like structure in which spokes are connected between the central boss portion and the guide portion 32 may be used.

[0025]

As described above, according to the conductor feeding method of the present invention, the conductor remaining amount in the stationary drum, the take-up speed of the take-up machine, and the fryer rotation speed at the standard take-up speed are used. The flyer rotation speed was calculated and calculated. Therefore, even if the line speed of the conductor by the take-up machine suddenly increases or decreases, or the remaining amount of the conductor wound on the stationary drum decreases and the frictional force between the conductor and the guide portion of the fryer changes, It is possible to reliably prevent the conductor from fraying and breaking, and to obtain a highly reliable conductor feeding device.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a conductor feeding method of the present invention.

FIG. 2 is a schematic view showing an example of a conductor feeding device corresponding to the conductor feeding method of the present invention.

FIG. 3 is a block diagram showing an example of a conductor feeding device and related steps.

FIG. 4 is a block diagram showing another example of a conductor feeding device and related steps.

FIG. 5 is a block diagram showing still another example of a conductor feeding device and related steps.

FIG. 6 is a perspective view showing an example of a fryer.

FIG. 7 is an explanatory diagram showing a relationship between a guide portion of a fryer and a contact angle of a conductor.

FIG. 8 is a diagram showing a relationship between a remaining amount of a conductor drum and a feeding force.

[Explanation of symbols]

 1 conductor feeding device 2 conductor 3 stationary drum 4 covered electric wire 7 fryer 10 servo motor 21 take-up machine A take-up speed B drum remaining amount C fryer rotation speed

Claims (4)

[Claims] 1. A method of controlling the delivery of a conductor, wherein the conductor is delivered by rotation of a fryer concentric with the drum when the conductor is taken up from a wound stationary drum by a take-up machine. A conductor feeding control method, characterized in that the rotational speed of the fryer is controlled by calculation based on the remaining amount, the take-up speed of the take-off machine, and the fryer rotational speed at the standard take-off speed. 2. The conductor feeding control method according to claim 1, wherein the rotational speed of the fryer is controlled by a speed command to a servo motor. 3. The method for controlling the delivery of a conductor according to claim 1, wherein the rotational speed of the fryer is determined from a ratio between the take-up speed and the remaining amount of the drum. 4. The number of revolutions of the fryer is determined by multiplying the ratio of the take-up speed to the remaining amount of the drum by the ratio of the number of fryer revolutions at the standard take-up speed to the standard take-off speed. 4. The method of controlling the pay-out of a conductor according to claim 3, wherein: